• Lahore drops to fourth rank in list of wold's most polluted cities.
• AQI in Lahore hovers between "very unhealthy" 200 and 300.
• India's New Delhi tops world most polluted cities list with AQI of 582.
  

The air quality in Lahore has shown signs of improvement as the air quality index (AQI) dropped below 300 on Sunday, continuing to remain in that range on Monday.

The easing conditions mark a positive shift in the metropolis that has been engulfed in smog for almost over a month, moving down to the fourth rank in the rankings of the list of the world's most polluted cities which it previously dominated.

Currently, India's New Delhi reigns at the top of the world most polluedt cities list with a hazardous AQI of 582.

Despite noting an improvement in its AQI, the capital of Punjab continues to hold the title of the most polluted city in Pakistan.

On Monday, the AQI was recorded at 267 in the provincial capital around 9:30 this morning, registering the fourth worst air quality in the world while the (PM2.5) pollutants in the air amounted to 191.8, which is 38.4 times higher than the World Health Organisation's (WHO) annual air quality guideline value.

The AQI fluctuated between 300 and 450 — considered "hazardous" by Swiss air quality technology firm, IQAir — from Saturday evening to Sunday afternoon. Since then, the AQI has stabilised, hovering between 200 and 300, classified as "very unhealthy".

This seasonal battle against air pollution in Punjab is exacerbated by cold, heavy air that traps dust, smoke, and emissions, particularly from farm fires.

However, the recent decline in smog levels allowed authorities in Lahore and Multan to reopen schools last week after a more than week-long closure due to hazardous pollution levels.

Students would have to wear face masks and outdoor sports will remain suspended at all educational institutes.

Breathing toxic air has catastrophic health consequences, with the WHO warning that strokes, heart disease, lung cancer and respiratory diseases can be triggered by prolonged exposure.

According to a University of Chicago study, high levels of pollution have already reduced life expectancy in Lahore, the capital of Punjab with its 14 million inhabitants, by 7.5 years.

Experts believe that modernising car fleets, reviewing farming methods and making the transition to renewable energies are the keys to overcoming the smog that paralyses millions of Pakistanis and Indians every year.